Hi Antoine! You are correct! Rest easy everyone, I know that was a hard one.
VK type submarine No 13 . Coastal sub. about 300 tons, 2 torp tubes , 26 men , 11/8 knts.
This submarine was a British Vickers design, for the Japanese Imperial Navy. I do not know if it was built in Britain or in Japan under license. Remember the Japanese battle cruiser 'Kongo'? It was also built around that same time from 'Vickers'. Kongo was the last major warship built for Japan from overseas. The other three 'Kongo's were built in Japan. Then on Japan would build her own superb warships. Their Japanese submarines evolved and branched out with their own remarkable designs like ones of other Navies, Britain, Russia, Sweden, Netherlands. All had purchased, or were permitted to build their own versions under licence of one or more 'Holland' boats initially to begin each their own embryonic submarine service.